Both are wrong, no need for arguments. If JJ really has no plans in getting back together with Leo, then they need to have a closure. So that leo will know what his mistake, although, it was obvious what are Leo's mistakes. But base on the chapters, leo is slow on noticing those such things.
It was cruel for JJ not to give closure but it was also cruel for Leo for failing to notice that his partner was suffocating in their relationship.
Both were inlove(they sill do). No need to blame the other side. Both were hurt. If leo is suffering, so is JJ.(let's wait patiently for his POV)
Ps. If it's not the plot, then closure is surely the best option to give. But it is what it is









Yes mommy go get your man